public class HardDisk {
 	int amount;
 		void setAmount(int m) {
        	amount = m;
        	}
 		int getAmount() {
        		return amount;
        }
 	public String toString() {
        	return Integer.toString(amount);
        	}
 		static boolean equals(HardDisk a,HardDisk b) {
        		if(a.amount==b.amount)
            			return true;
        	else
        		return false;
        }
 	}
